I run the reactor listed above on my 120/60gal sump and it works great, I also have a fluval 305 onin the display and put the phosban in the bottom under the polishing pads and it stays in nice and seems to change color just like the media in the reactor.
Fluval makes a phospate remover granual packet, for fresh and salt that runs perfect in the canister fliters, I know its a jump at a price to get the reactor but worth it in the long run!
Id say give it a shot, save some $$$ and if the phosphate runs up on you get the reactor!
Cheers